Pump.



R. CONRADER.

PUMP.

APPLIUATION FILED MAY 17, 1910.

Patented Feb. 14, 1911.

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RUDOLPH CONRADER, OF ERIE, PENNSYLVANIA.

PUMP.

Specification of Letters Patent.

Patented Feb. 11,1-, 1911.

To all whom it may concern:

Ie it known Athat I, RUDOLPH Gommone, a citizen ot the United States,residing at Erie, in the county of Erie and State o't Pennsylvania, haveinvented new and useful Improvements in Pumps, oit which the followingis a specification.

This invention relates to pumps, and consists in certain improvements inthe construction thereof as will be hereinafter fully described andpointed out in the claims.

More particularly, the invention relates to pumps ordinarily used inArtesian wells, and pumps in which there are flexible cups, either forthe plunger or :t'or packing for parts of vthe pumps. In the ordinaryuse of these pumps, it is frequently necessary to pull the plunger orother parts from the barrel, and where the pump has been in operation,there is above the plunger' a column of liquid of great height, thusexerting a tremendous pressure on the plunger. Vhen, therefore, theplunger reaches a point opposite the point between the working barreland the tubing, the sides o't' the cup :flare out, catch the shoulder ofthe tubing and are destroyed. Not only this but portions of the cup areordinarily thrown oft', and these are left in the well, and gettine'under the valves, often require a second piilling oit the valve to clearthem, with the danger in the second pulling as in the first, eldestroying the cups, and depositing the pieces of the cups in the well.The object of the invention is to prevent this.

The invention is illustrated in the accompanying drawings as follows:

Figure 1 is a central section of the pump on the line 1-1 in Fig'. 2,the plunger heing in elevation; Fig. 2 is a section on the line 2-2 inFig. 1; Fig. 3 is a section on the line 3-*3 in Fig. 2, the plungerbeing also partly in section.

l marks the working barrel; 2 the standing valve; 3 the coupling at thetop oit' the working barrel; and l the tubing secured into the coupling3. The plunger 5 has the usual Vflexible cups 6. These are secured on asleeve 7 extending longitudinally of the plunger, and supported by thenuts or collars 8. The parts so far described are of the usualconstruction.

At the top of the working barrel are arranged passages 9. These areformed by sawing slots as shown, the slots extending from the top or'the working barrel a distance downwardly somewhat greater' than thedepth ot the cup so that when the cup is brought abreast of the slots,the liquid above the pl unger can pass through the slots and escapebelow, thus balancing the pressure above and below as the cup passesfrom the end ot thc working barrel up into the tubing. This balancing ofthe pressure prevents the outsprcading of the cup as herctoiloredescribed. Any passage or by pass that will accomplish this purpose maybe used, but I prefer the saw slot as shown.

Vhat I claim as new is:

1. In a pump the combination ot a tube having a longitudinal passage inthe walls thereof and a llcxible cup for maintaining a column oi liquidin the tube, the sides of the cup and the length of the longitudinalpassage being proportioned to permit et a movement o'lt the liquidthrough the passage past the cup when the cup is in position abreast thepassage.

2. In a. pump the combination of a tube having' a longitudinal passagein the walls thereo'l extending `from the ends et the tube; a couplingarranged on said end of' the tube; a second joint oil tubing secured tothe coupling; and a llexible cup for maintaining a column oli' liquid inthe tube, the size of the cup and the length of the longitudinal passagebeing proportioned to permit ot a movement. et' the liquid through thepassage past the cup when the cup is abreast of the passage.

8. In a pump, the combination of a tube having' a slot, extending lromthe top thereof downwardly in the tube; a flexible cup ttor maintaininga column of liquid in the tube, the size of the cup and the length ofthe slot being proportioned to permit ot a movement ol liquid throughthe slot past the cup when the cup is abreast the passage.

4t. In a pump, the combination of a working barrel having a longitudinalpassage, extending 'from the top thereof downwardly; a plunger in theworking barrel being formed with flexible cups. the length of thepassage and the size of the cups being proportioned to permit et' apassage of liquid through the slot past the cups, when the cup isabreast the passage.

5. In a pump the combination of a working barrel having slots out fromthe top thereof downwardly; and a plunger in the working barrel havingcups, the length of the slot and the cups being proportioneel to permitof the passage of liquid through the slots from above the cup' to belowthe cup, when the cup is brought abreast the slot.

In testimony whereof have hereunto set my hand 1n the pres-ence of twosubscribing witnesses.

RUDOLPH CONRADER. Witnesses THOMAS C. MILLER, MARGARET M. BEIGLE.

